Kensington Watches
Tissot Seastar 1000 T120.417.17.051.00 Men's Watch – 45.5mm Black Dial Rubber

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Tissot

Tissot Seastar 1000 T120.417.17.051.00 Men's Watch – 45.5mm Black Dial Rubber

Ref. T120.417.17.051.00

Among our 374 Tissot watchesThis watch£399
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Stepping up in the same colour and case shape

Price range £245 to £2,740 across 374 Tissot watches in stock.

A substantial dive-oriented chronograph, the Seastar 1000 runs to 45.5mm across and 12.8mm thick, with a 316L stainless steel case sitting on a 22mm black rubber strap fastened by a standard buckle. The black dial carries chronograph sub-dials measuring to 1/10th of a second across a 30-minute and 60-second range, alongside a date display and a battery end-of-life indicator. Hands and hour markers are lumed for low-light legibility. A unidirectional rotating aluminium bezel and sapphire crystal with double-sided anti-reflective coating complete the picture, with water resistance rated to 300 metres.

Reference
T120.417.17.051.00
Brand
Tissot
Collection
Seastar
Case size
45.5mm
Case material
Stainless steel
Case shape
Round
Dial
Black
Crystal
Sapphire
Bezel
Unidirectional rotating
Movement
Quartz
Calibre
ETA G10.212
Functions
Chronograph, Date
Water resistance
300m
Bracelet / strap
Rubber strap
Strap colour
Black
Clasp
Buckle
Lume
Luminous
Retailer
Watch Enclave
Additional specifications
Origin
Swiss made
Learn more about Tissot

Charles-Félicien Tissot and his son Charles-Émile founded the company in Le Locle in 1853, assembling gold pocket watches and, unusually for the time, exporting aggressively — Russia became a major market within a decade.

Tissot's history is a sequence of firsts achieved through willingness to try materials and ideas the establishment considered unserious. The first mass-produced pocket watch with two time zones came in 1853. The first anti-magnetic wristwatch in 1930. The Astrolon of 1971 was the first watch with a movement made largely of injection-moulded plastic, and it worked. The RockWatch of 1985 used Alpine granite for the case, followed by watches in wood and mother-of-pearl.

The T-Touch of 1999 was the most significant: a tactile sapphire crystal allowing the wearer to access altimeter, barometer, compass, thermometer, and chronograph by touching the glass, years before touchscreens were commonplace.

Tissot merged with Omega in 1930 and both became founding members of what is now the Swatch Group. Its position in the group is volume and accessibility — Swiss mechanical and quartz watches at prices most people can reach, with the Powermatic 80 movement offering an eighty-hour reserve at entry level.

The company has held timekeeping roles across cycling, basketball, motorsport, and fencing.

1853
Founded in Le Locle by Charles-Félicien and Charles-Émile Tissot.
1930
Merges with Omega; releases the first anti-magnetic wristwatch.
1971
The Astrolon uses a plastic movement.
1985
The RockWatch is cased in Alpine granite.
1999
The T-Touch introduces a tactile sapphire crystal.

All Tissot watches

Also in 6 collections

This watch appears in the Tissot Seastar range (53), Stainless Steel Watches (3,088), Chronograph Watches (1,182), Watches 44mm and Over (798), Sports Watches (794) and Dive Watches (567).

Temporarily out of stock

Watch Enclave is not currently taking orders for this reference. Last listed as available on 8 August 2026. Stock is checked nightly and this page updates when it returns.

Out of stock

What the specifications mean

A watch built to be worn hard and got wet.

Strengths

  • 300m water resistance, rated for actual diving
  • Sapphire crystal, which resists scratching
  • Luminous hands and markers for low light
  • Sits in the lower half of Tissot's range as we list it

Worth knowing

  • 45.5mm is a large watch with real presence
Best forDivingSwimmingTiming things
Less suited toSmall wrists

Tissot Seastar 1000 T120.417.17.051.00 alternatives

Watches from other brands at a similar price, style and size, so you can see what else your budget can buy.

Seastar 1000 T120.417.17.051.00 Men's Watch – 45.5mm Black Dial Rubber compared with 2 alternatives from other brands
SpecificationThis watchSeastar 1000 T120.417.17.051.00 Men's Watch – 45.5mm Black Dial RubberT120.417.17.051.00BulovaMarine Star 96B432 "C" HPQ Precisionist Watch - EXCLUSIVE - W0933796B432Hugo BossHero Chronograph Quartz 44mm Mens Watch Black1514267
Price£399£379£349
Case size45.5mm43mm44mm
Water resistance300m200m
MovementQuartzQuartzQuartz
StrapRubber strapSilicone strap
This watch
  • Rated shallower
  • Wears smaller
  • Costs less
  • Wears smaller

Your new watch

Frequently asked questions, and things you should know about this watch

Can I swim with it?

Yes. At 300m it is rated for swimming, snorkelling and recreational diving.

Water resistance explained

Will the glass scratch?

Unlikely. Sapphire is second only to diamond in hardness and shrugs off everyday marking.

Sapphire, mineral and acrylic compared

Does it need a battery?

Yes. It is quartz, so expect a battery change every two to three years at a jeweller.

Quartz, automatic and solar compared

Is it a men's or women's watch?

Listed as men's.

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